These simple lycra stretch resistance bands are so simple but so effective. Use for sensory play, stretching and resistance exercises. The variations of use are extraordinary. Because the band is made of wide lycra and not rubber it is much softer and the pressure on joints is far less stressful - making the user more relaxed. Can be used for passive and for Proprioceptive Neuromuscular Facilitation (PNF) stretching. These bands give far more sensory feedback, while promoting a more efficient use of energy and improving strength and mobility.